Hey Graham,
Yeah I sent you a big fin head with the cases way back when this project was just an engine case and a used kit.
At the time i thought I was working with a Parmakit because it was so crusty and i couldn't see any markings on it. So you cut me a rad 46mm squish on the big fin head (which is now very happily running on a wizard kit on my other hobbit) but literally years later I discovered that I was actually working with an old version of the Athena 47.6, which is why I had to opt for the Puchonda head with the larger squish diameter.
Totally my bad :)